dm: dts: Convert driver model tags to use new schema

Now that Linux has accepted these tags, move the device tree files in
U-Boot over to use them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/bcm6855.dtsi b/arch/arm/dts/bcm6855.dtsi
index 05e0a4e..10c003a 100644
--- a/arch/arm/dts/bcm6855.dtsi
+++ b/arch/arm/dts/bcm6855.dtsi
@@ -65,7 +65,7 @@
 	};
 
 	clocks: clocks {
-		u-boot,dm-pre-reloc;
+		bootph-all;
 
 		periph_clk: periph-clk {
 			compatible = "fixed-clock";
@@ -126,7 +126,7 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0 0xff800000 0x800000>;
-		u-boot,dm-pre-reloc;
+		bootph-all;
 
 		uart0: serial@12000 {
 			compatible = "arm,pl011", "arm,primecell";